Seal-lock.



910.799.934. PATENTBD MAY 16, 1905. W. T. PBRGTVAL.

SEAL LOCK.

APPLIOATION FILED 00TH. 1993.

werf/f f5 //1 11e/1 for 7gg/Z M i UNITED STATES Patented May 16, 1905.

PATENT OEETCE.

W'ILLIAM THOMAS PEROIVAL, OF PENSHURST, NEW SOUTH WALES, AUS- TRALIA,ASSIGNOR TO JAMES OHANNON, OF PAKENHAM, HORNSBY, NEAR SYDNEY, NEW SOUTHVALES, AUSTRALIA.

SEAL-LOCK.

SPECIFICATION forming part of Letters Patent No. 789,934, dated May 16,1905.

Application led October 8, 1903. Serial No. 176,205.

.To all whom, t Wto/,y concern:

Beit known that I ,WILLIAM THOMAS PERCI- VAL, engineer, a subjectof theKing of Great Britain, and a resident of Basset street, Penshurst, nearSydney, in the State of New South Wales and Commonwealth of Australia,have invented new and useful Improvements in Seal-Locks SpeciallyApplicable for Strap- Buckles, as of Mail-Bags, of which the follow- Ioing is a specification.

This invention refers to seal-locks specially devised for use onmail-bags, though useful to prevent unauthorized access to any fasteningor other things, and it has been specially devised in order to constructsuch a lock having a Sliding bolt with a secure locking deviceunassisted by any mechanical spring and having no protruding parts; butin order that this invention may be clearly understood ref- 2o erencewill now be made to the drawings herewith, in whichn A Figure 1 is aperspective view of a seal-lock constructed according to these presentimprovements. Fig. 2 is a longitudinal sec- 2 5 tional elevation of thesame unsealed and ready to be disengaged, and Fig. 3 is a perspectivesectional view of the same locked and sealed.

The strap, as ordinarily, has end 6 sewed or otherwise fastened to chape7, which joins 3o the sides 8 of the lock casing or boX and is the pivotof the tongue 9, which takes on restbar 10. The buckle or lock-box has ahinged leaf or cover 11. Within this cover 11 is a chamber 12, adaptedto receive the seal 13 of the lock, so as to form a ceiling or top forthe sliding bolt 15. The seal 13 is composed of strawboard or cardboardof sucient thickness that it may be centrally bulged under pressure andwill recover its original shape and retain such shape, or this seal maybe composed of wood veneer or easily-destructible metal or other fiatmaterial having the same quality. The sliding bolt 15 fills the chamber12 under the seal 13, which chamber forms a guide for the said bolt 15.The forward end 16 of said bolt 15 is a latch end or has a round nosingor taper and is adapted to take in a socket or housing 17 on the end ofthe lock-casing. This bolt 15 has movement longitudinally which isgoverned by its shoulders 18 and 19. The back end of this bolt 15 isslotted and has a guide-piece 20 in a housing 21 in the back of thecover 11. Pivoted to lugs or ears 22 in the chamber 12 and Within thisslot of the bolt 15 is a lever-piece or trig- 55 ger 23, whose lowermember takes on the end 24 of the slot of bolt 15, so that it will givemotion to said bolt 15 or act as a stop against its backward movement.The upper member of this trigger 23 is adapted to lit com- 60 fortably,though hardly pressed, under the seal 13 when the bolt l5 is in itsforward position in the housing 17. As the bolt 15 is pushed backwardlyby the contact of the latch or nosing 16 with the corresponding 65nosing of the housing 17 on the closing of the cover 11 onto thelock-casing the lower member of the trigger 23 is forced backward by end24 ofthe bolt-Slot and the upper member bulges or forces the seal 13centrally upward for 70 the moment. The recovery of said seal 13 to `itsnormal position then forces the bolt end 16 into its housing 17, and itis retained or sealed there until the seal 13 is destroyed and the bolt15 withdrawn. 75

The cover 11 has an orifice 14 for revealing markings on the seal 13 andthrough which a hook may be inserted into one or other of holes 25 towithdraw the bolt. The pintles 26 on the cover 11 fitting sockets 27 inthe 80 casing prevent the withdrawal of said cover by the removal of thehinge-pin.

In use, the bolt 15 being drawn outwardly from the hinge end, the seal13, having' the quality before mentioned, is inserted through theopening 28 in the side of the chamber l2, fitting comfortably over thesliding bolt 15. When it is desired to lock and seal the fastening, thecover 11 is shut down and the bolt is forced inwardly by its end 16contacting 90 with the housing 17. The trigger 23 by this force iscaused to bulge that part of said seal 13 just above its upper memberuntil the bolt 15 is opposite its socket 17, into which it is shot'bythe return of the seal to its normal position andretained therein by thestiffness of said seal, and the lock is thus secured or sealed until theseal 13 is destroyed. The seal -is destroyed by an appropriate toolthrough the orifice 14, and this inthe form of a hookbar is insertedinto a hole 25 to Withdraw the bolt, and so release the lock.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is" 1. In combination with the frame of a seallock, of abolt therein, and a' flexible seal which acts'as a spring to seat thebolt, substantially as set forth.

2. In a seal-lock, the combination with a frame having a recess therein,of a bolt Within the recess, and a flexible seal covering the A recessand serving as a spring to seat the bolt,

substantially as set forth.

3. In a seal-lock, the combination with a frame having avrecess therein,of a bolt Within the recess, a dog engaging with the bolt, and aflexible seal covering the recess and engaging With the dog, serving toseat the bolt, substantially as set forth.

4f. In a seal-lock, the combination with tvvo parts hinged together anda bolt for securing the parts in engagement, of the pintle's 26 carriedby one of the parts, engaging Within sockets Vin the other, and aflexible seal for sealing the bolt, substantially as set forth.

5. In a seallockthe combination with a chamber 12 adapted to receive aneasily-destroyable resilientr seal 13 to form its ceiling or top, of abolt 15, a pivoted lever-piece or trigger 23 adapted to be actuated bymovement of said bolt against the force or stiffness of said seal and toshoot and retain by means of said force or stiffness the bolt in thelocked position, substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

WILLIAM THOMAS PERCIVAL.

